The blueness of a wound cleanseth away evil: so do stripes the inward parts of the belly.(Proverbs 20:30)

The king's heart is in the hand of the LORD, as the rivers of water: he turneth it whithersoever he will.(Proverbs 21:1)

Every way of a man is right in his own eyes: but the LORD pondereth the hearts.(Proverbs 21:2)

To do justice and judgment is more acceptable to the LORD than sacrifice.

An high look, and a proud heart, and the plowing of the wicked, is sin.(Proverbs 21:4)

The thoughts of the diligent tend only to plenteousness; but of every one that is hasty only to want.(Proverbs 21:5)

The getting of treasures by a lying tongue is a vanity tossed to and fro of them that seek death.(Proverbs 21:6)

Other publications related to "Proverbs 21:3":

X-ray of the heart (part 2)
Speaker discusses the role of shame and guilt in Christian life and emphasizes the importance of approaching God confidently for restoration and living an abundant life.

Above all else, guard your heart!
In this article, Dr. Roberto Miranda talks about how God tests peoples hearts to see who is committed to the mission, self-controlled, and interested in their own needs. He emphasizes the importance of having a heart that pleases God and guarding it from negative emotions like pride, envy, and hate. The article ends with a prayer for a clean heart.

Proverbs 21:3 - Cross Reference

Thus saith the LORD of hosts, the God of Israel; Put your burnt offerings unto your sacrifices, and eat flesh. (Jeremiah 7:21)

And to love him with all the heart, and with all the understanding, and with all the soul, and with all the strength, and to love his neighbour as himself, is more than all whole burnt offerings and sacrifices. (Mark 12:33)

For I desired mercy, and not sacrifice; and the knowledge of God more than burnt offerings. (Hosea 6:6)

And Samuel said, Hath the LORD as great delight in burnt offerings and sacrifices, as in obeying the voice of the LORD? Behold, to obey is better than sacrifice, and to hearken than the fat of rams. (1 Samuel 15:22)

I will not reprove thee for thy sacrifices or thy burnt offerings, to have been continually before me. (Psalm 50:8)

To what purpose is the multitude of your sacrifices unto me? saith the LORD: I am full of the burnt offerings of rams, and the fat of fed beasts; and I delight not in the blood of bullocks, or of lambs, or of he goats. (Isaiah 1:11)

Wherewith shall I come before the LORD, and bow myself before the high God? shall I come before him with burnt offerings, with calves of a year old? (Micah 6:6)

The sacrifice of the wicked is an abomination to the LORD: but the prayer of the upright is his delight. (Proverbs 15:8)